System for controlling video distribution in response to a request on reduced video data traffic and a method therefor
Inactive Publication Date: 2014-09-18
OKI ELECTRIC IND CO LTD
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- Abstract
- Description
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- Application Information
AI Technical Summary
Benefits of technology
The invention aims to distribute video at a transfer rate close to the content distributor's transfer rate, while reducing video traffic and caching content in response to distribution requests. The technical effect of this invention is to allow for efficient video distribution and reduction of video traffic.
Problems solved by technology
In addition, it is known that the video traffic contains a large amount of redundant video data flowing.
However, the nature of the video distribution services causes the data volume of a single content to tend to be larger than that of other kinds of data, and thus further reduction in the video traffic is needed when taking account of the use of video distribution services becoming expanded more and more.
However, a simple application of the solution taught by Shogo ANDO, et. al., to reduce video traffic would not establish a stable transfer of video data, but might cause delay in viewing the video.
Therefore, since messages requesting content distribution may be different every time, content may not effectively be cached in response to a content distribution request.
Method used
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[0032]Some preferred embodiments of a video distribution system in accordance with the present invention will be described in detail with reference to the accompanying drawings.
[0033]First with reference to FIG. 1 showing, in a schematic block diagram, the entire configuration of a video distribution system 1 in accordance with an illustrative embodiment, the video distribution system 1 comprises a content distributer 100, a cache control server 200, a communication network 300, a cache distribution server 400 and a terminal device 500, all of which are interconnected as illustrated. Portions of the video distribution system 1 which are not directly relevant to understanding the present invention will neither be shown nor described. In the following description, signals are indicated by reference numerals attached to connection lines on which they appear.
[0034]The terminal device 500 is adapted to request the content distributer 100 to distribute video data and to reproduce received...
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In a video distribution apparatus, when a video data segment into which video data of a content is sectioned on the basis of a predetermined unit is received on a network, the received video data segment is cached into a memory, and at least content identification information of the video data is stored into the memory. When a cache distribution request is acquired on the network, a distribution controller obtains content identification information included in the request. A relay controller acquires a video data segment associated with the obtained content identification information from the memory, and transfers the acquired video data segment to a source of the request at a transfer rate at which the video data segment is transferred in the vicinity of a distributing source of the video data.
Description
BACKGROUND OF THE INVENTION[0001]1. Field of the Invention[0002]The present invention relates to a system for controlling video distribution in response to a request for video data, and more particularly to a cache control apparatus for controlling video cache in a video distribution system on a telecommunications network.[0003]2. Description of the Background Art[0004]In recent years, use of video distribution services for distributing video data over telecommunications networks has been expanded. It is said that video traffic regarding video distribution services makes up a large share of network traffic. In addition, it is known that the video traffic contains a large amount of redundant video data flowing. Therefore, reducing such redundant video data traffic causes a reduction in a load on the entire video traffic, and thus leads to an increase in efficiency of the traffic over the entire networks.[0005]Hitherto, a solution for diminishing the traffic of redundant video data is...
Claims
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Login to View More IPC IPC(8): H04N21/231
CPCH04N21/23106H04N21/8456
Inventor INAO, TOMOHISA
Owner OKI ELECTRIC IND CO LTD